Stimuli-Responsive Interconversion between Poly-NHC-Based Organometallic Assemblies and Their Self-Aggregated Dimers  

作　　者：Guang-Feng Jin Ying-Feng Han 

机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education,Xi'an Key Laboratory of Functional Supramolecular Structureand Materials,College of Chemistry and Materials Science,Northwest University,Xi'an,Shaanxi 710127,China

出　　处：《Chinese Journal of Chemistry》2024年第22期2840-2844,共5页中国化学（英文版）

基　　金：supported by the National Natural Science Fund for Distinguished Young Scholars of China(No.22025107);Shaanxi Fundamental Science Research Project for Chemistry&Biology(No.22JHZ003)。

摘　　要：Poly-NHC-based organometallic assemblies 3-PF_(6),3-SbF_(6) and 3-OTf were obtained and verified by NMR spectroscopy,ESI mass spectrometry and single-crystal X-ray diffraction analyses.Controllable structural interconversion was observed between the poly-NHC-based organometallic assemblies and their self-aggregated dimers in solution affected by concentration,solvent and metal ion.1H NMR spectra of assembly 3-PF_(6) in CD_(3)CN at different concentrations demonstrated controllable structural interconversion,and ^(19)F NMR spectrum of assembly 3-PF_(6) at high concentration further evidenced the presence of the free hexafluorophosphate anion and encapsulated hexafluorophosphate anion for its two sets of signals.In addition,single-crystal X-ray diffraction analysis provided clear evidence that in the solid state,two assemblies 3-PF_(6) were vertically stuck,forming a self-aggregated dimer with an encapsulated hexafluorophosphate anion.Investigating the reversible structural interconversion is beneficial for revealing the intrinsic nature on the atom level and paving the way to design the stimuli-responsive functional system.

关 键 词：N-Heterocyclic carbene Organometallic assemblies Self-aggregated dimer STIMULI-RESPONSIVE Structural interconversion Concentration Solvent Metal ion 

分 类 号：O63[理学—高分子化学]